Development of efficient vibration analysis and control method for automobile structures
汽车结构高效振动分析与控制方法开发
基本信息
- 批准号:22KJ2418
- 负责人:
- 金额:$ 1.09万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for JSPS Fellows
- 财政年份:2023
- 资助国家:日本
- 起止时间:2023-03-08 至 2024-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
一般に,自動車をはじめフレームとパネルからなる大規模構造物全系の振動はフレーム構造を主系,パネル部材を従系とした多自由度系の振動として,主系と従系単体の変形を重ね合わせた形で表現できる.したがって大規模で複雑な機械製品の振動分析では,構造全体の振動を司る主系と局所的な振動を励起する従系の振動,およびそれらの関連性を設計初期段階で正確に把握することが重要である.本研究ではこの観点から,効率的な振動分析と対策を支援する目的で,大規模構造における各構成要素の振動を自動的に抽出し,各要素の連成度合を定量的に評価する手法を提案した.モデルの構造全体の変形は変位が空間的に広く遍在していることから,空間周波数が低い変形であるのに対し,モデルの部材単独の振動は局在性を持つため,空間周波数が高い変形である.この観点から,本研究では三次元有限要素モデルの固有モードを三次元離散信号(ボリュームデータ)に変換することにより,三次元離散ウェーブレット変換を適用した.これによって緻密かつ複雑なモデルにおいて全容や詳細が目視で把握することが困難な場合でも,モデルの構造に依拠せず空間周波数の高低のみで構造全体の変形と局所的な変形を自動的に区別し,分離できることを示した.次に,空間周波数の高低で分離した各成分の振動形状に対して形状相関に基づいた直交変換を繰り返し適用することにより,モデルの構成要素単体の振動モードを分離した.さらに,この直交変換プロセスの履歴を用いて各固有モードに含まれる各構成要素のモードの割合(連成度合)を定量的に示し,各構成要素の振動の関連性を簡便に評価できることを示した.また,本研究で得られた成果を学会誌および学会での発表を行った.
In general, the whole system of large-scale model building is the vibration system, the main system is the multi-degree-of-freedom system, the main system is the main system, the main system is the vibration system, the main system is the vibration system, the main system is the multi-degree-of-freedom system, the main system is the vibration system, the main system, the main system, the The vibration response of the main department of the main department of the vibration department is designed to stimulate the vibration of the system, and the initial stage of the design is correct to grasp the importance of the system. In this study, the vibration analysis strategy is used to support the purpose of the system, and the large-scale model is built to form the elements of vibration automation. The degree of connection of each element is consistent with the proposal for the method of quantitative measurement. The number of waves in the space is all over the air, the number of waves in the space is low, the number of waves in the space is low, the vibration of the equipment is in a high frequency, and the number of waves in the space is high. In this study, the three-dimensional finite elements, the inherent data, the three-dimensional dispersion signals, the three-dimensional finite elements, the three-dimensional dispersion signals, the three-dimensional dispersion According to the difference of the number of cycle waves in the space, the automatic operation of the whole machine is made, which is separated from the number of cycles in the space, the number of cycles in the space is high or low, the number of waves in the space is high or low, and the components of each component of the machine are separated. The shape of the vibration is similar to that of the base line, the base line is the same as the base line, and the return cycle of the machine is separated from each other. The components of the system are separated from each other, the components are separated from each other, and the components are separated from each other by the use of the inherent components of each component, which contains the quantitative indication of each component. In this study, we have obtained the results of this study.
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Development of Mode Separation Method for Frame-Panel Structures Using 3D Discrete Wavelet Transform
利用 3D 离散小波变换开发框架-板结构模态分离方法
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:NAKASHIMA Itsuki;INOUE Takumi;TAKAHASHI Hidenori;Itsuki Nakashima
- 通讯作者:Itsuki Nakashima
Component mode decomposition using three-dimensional discrete wavelet transform and its application to relevance evaluation of characteristic modes
三维离散小波变换分量模态分解及其在特征模态相关性评价中的应用
- DOI:10.1299/transjsme.22-00242
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:NAKASHIMA Itsuki;INOUE Takumi;TAKAHASHI Hidenori
- 通讯作者:TAKAHASHI Hidenori
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